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    Question

    The average age of a group of 15 students is 20

    years. Two persons of age 50 years and 35 years, left the group and 2 persons of age 50 years and 80 years, joined the group. Find the new average age of the group.
    A 23 years Correct Answer Incorrect Answer
    B 25 years Correct Answer Incorrect Answer
    C 27 years Correct Answer Incorrect Answer
    D 21 years Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Required average = {(15 × 20) – 50 – 35 + 50 + 80}/15 = 23 years

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